EP2650892A1 - Control device of a medium-voltage electric switchgear unit and switchgear unit controlled by one such device - Google Patents

Abstract

The device has closure elements (12) and an opening (15) located opposite to a closure actuating-element and an opening actuating-element. A mechanical connector comprises a part that is integrally connected with the closure elements. A retractable element is cooperated with an actuator that actuates the closure actuating-element in a retractable position to transmit a command to the closure element. An interlocking device is controlled by a selector.

Description

The present invention relates to a device for controlling a medium-voltage electrical protection device interposed between two parts of an electrical circuit so as to allow the passage of current or to interrupt the current between the parts, said apparatus comprising a switching device electrical device can take a closed position of current flow or an open position of interruption of the current, said cutoff device comprising at least one actuating member for opening the contacts of the apparatus and at least one member of actuation for closing the contacts, said actuating members respectively opening and closing being able to transmit a control command respectively to at least one opening member and at least one closure member contacts by the intermediate of a mechanical connection, said control device also comprising means for interrupting the connection said mechanism so as to render inoperative any activation of any closing actuating member in cases where it is not necessary to give a closing order in order to guarantee the safety of the persons or the installation, said closure members and said apertures being rotatably mounted about two substantially parallel axes with respect to each other, the closing and / or opening of the contacts being obtained by rotating the aperture member, by means of opening actuation, or respectively of the closing member, by the closure actuating member.

Mechanical interlocking devices are known that equip circuit breaker mechanisms, and make it possible to perform various functions for protecting the operations of these mechanisms, such as preventing the closure if a maintained opening command has already been given, or if device is already closed.

However, these devices are integrated into the internal mechanism of the device and their design is complicated.

In addition, these devices can not be placed on the front panel and do not vary the type of buttons used for local manual controls.

The present invention relates to a control device of a simple design apparatus, which can be placed in front of the apparatus and to vary the type of buttons of the local manual controls.

For this purpose, the subject of the present invention is a device for controlling a medium-voltage electrical protection equipment of the kind mentioned above, this device being characterized in that the aforementioned closing and opening members are situated substantially respectively facing each other. a closure actuating member and an opening actuating member, and in that the aforementioned mechanical connection comprises a piece integral with the closure member, said piece comprising a retractable element movable between a first position in which said retractable element is adapted to cooperate with the actuating element of said closure actuating member so as to transmit the closure order to the closure member, and a second position in which said element is retracted and is no longer able to cooperate with said element of the closing actuator, the displacement of said element of the deployed position in the retracted position being controlled by a closed state of the contacts or an open order maintained contacts, or by the activation of locking means of access to the operating shaft of the control contacts of the switchgear. Thus, thanks to these characteristics, it is possible to use pressure-type buttons comprising an actuating element movable in translation, or else of the rotary type comprising an actuating element movable in rotation that is rotatable to move in rotation. either the slideway or the opening actuating member.

According to a particular characteristic, said apparatus further comprising an apparatus for grounding in series with said breaking apparatus, this device is characterized in that it comprises an interlock device controlled by a movable selector between a first position in which the access port to the operating shaft of the control of the switchgear is released and the access port to the operating shaft of the setting shaft; to the ground is closed, and a second position corresponding to an intention to ground or to an effective grounding, in which the access port to the operating shaft of the output shaft. the earth is released while the access opening to the operating shaft of the control is closed, and in that the movement of said retractable element between the two aforementioned positions is controlled by a return of said interlocking device so as to prevent the closing of the aforementioned apparatus when the selector is in the second aforementioned position. These characteristics make it possible to couple the operating needs of the circuit breaker or switch with the needs of interlocking with respect to the earthing switch.

According to another characteristic, the aforementioned mechanical connection comprises a piece forming a slide support integral with the closure member and in which is slidably mounted a slide constituting the aforementioned retractable element.

According to another characteristic, this slide is operated either by an indicator of the position of the contacts, or by a part forming integral return of the opening member, by means of return means.

According to another characteristic, this slide is further manipulated either by the return of the aforementioned interlocking device when it is in the aforementioned second position, or by means of locking the access to the operating shaft of the the control of the switchgear controlling the return of said interlocking means.

According to another feature, the aforementioned interlocking device comprises a first interlocking lever freely rotatably mounted around the control shaft of the breaking device and comprising a flap adapted to close or release the orifice of access to the control shaft of the switchgear control, a second interlocking lever rotatably mounted about a fixed axis of the support and comprising a flap adapted to release or close the access hole to the grounding shaft, said interlocking levers being mechanically connected by a connecting rod, and a selector crossed by a pad belonging to the first lever, said selector being slidably mounted relative to a fixed support of the apparatus between the two aforementioned positions, the first interlocking lever comprising the aforementioned reference.

According to another characteristic, the aforementioned interlocking device comprises means for closing the access opening to the operating shaft of the grounding shaft, when this device is in the closed position.

According to another characteristic, these means comprise a stud secured to a piece integral with the control shaft of the contacts of the switchgear and constituting the position indicator of the aforementioned contacts, said stud cooperating with the first lever of interlocking mentioned above.

According to another characteristic, these return means comprise a first reference indicator said mounted articulated relative to an axis belonging to a fixed support of the apparatus and having a first portion cooperating with the integral part of the control shaft of the contacts of the switchgear constituting the aforementioned indicator and a second reference said sliding guide mounted hinged about a second fixed axis of the equipment support, said second reference having a first portion intended to cooperate with the second part of the first return via two pads located on said second return, and a second portion for cooperating with a return of the opening member.

According to another characteristic, these aforementioned locking means comprise a lock operable by means of a key and adapted to rotate a cam, said cam being adapted to cooperate with the return of said interlocking device, so as to bring about this device in a closed position or release of the access port to the operating shaft of the control of the switchgear.

According to another characteristic, one or each opening or closing member is integral with a secondary opening or closing shaft, said secondary shafts being mechanically connected to the control shaft of the breaking device. , each of the opening and closing members being retained in a position corresponding to a closed or respectively open position of the contacts of the apparatus by an opening or closing fastening device, this fastening device being releasable by the actuation of the corresponding organ.

According to another characteristic, the aforementioned slide has two openings separated by a partition, one of the openings being intended to receive an end portion of the closure member, said part being in abutment on the partition, and a spring in supported by one of its ends, on a flat part belonging to the aforementioned end portion, and by its opposite end, on an inner face of the slideway, said slideway also comprising a stud integral with said slideway and intended to cooperate with the slide return so as to allow the drive of said slide from one position to another.

According to one particular characteristic, this device comprises at least one manual opening operation button and at least one manual closing operation button, the actuating element of each button being adapted, when activated, to cooperate with the slide so as to drive it in rotation.

According to another characteristic, the or each manual opening operation button and the or each manual closing operation button is (are) located (s) on the front of the apparatus so as to be manoeuvrable from of this face by a user.

According to another characteristic, one or each manual opening or closing actuating member is a pressure button comprising an actuating element movable in translation to move the opening member or the slideway in rotation, according to that the button is used for opening or closing.

According to another embodiment, one or each manual opening or closing actuating member is a rotary knob comprising an actuating element movable in rotation to move the opening member or the slideway in rotation, depending on whether the button is used for opening or closing.

According to another particular embodiment, this device comprises a single rotatable knob rotatable in one direction or the other to achieve opening or closing, said knob comprising two actuating elements movable in rotation in two opposite directions of rotation. and capable of cooperating respectively with the opening member or the slideway.

According to another characteristic, this device comprises at least one remote actuating coil, the actuating element of the coil cooperating with the slideway via a support comprising a pallet mounted freely rotatable around the organ closure, said support having a portion cooperating with a portion of the slide, so that the actuation of the coil drives, through the pallet, the rotation of the support and the slide, and thus, the rotation of the closure member.

According to another feature, the switchgear is a vacuum circuit breaker or a vacuum switch and the grounding apparatus is a grounding switch.

The invention also relates to a medium voltage electrical protection apparatus comprising an opening member and a closure member capable of controlling the opening and closing of the contacts, this apparatus being characterized in that it comprises a control device comprising the aforementioned features taken alone or in combination.

The present invention relates to a medium-voltage electrical cell comprising at least one apparatus comprising the above-mentioned features taken alone or in combination.

BRIEF DESCRIPTION OF THE DRAWINGS

• La figure 1 est une vue en plan illustrant la partie intérieure d'une partie de la commande de la cellule électrique moyenne tension selon l'invention,
• La figure 2 est une vue de détail à échelle agrandie, illustrant plus particulièrement les systèmes d'accrochage d'ouverture et de fermeture du disjoncteur ou interrupteur de la cellule,
• La figure 3 est une vue partielle illustrant le dispositif d'accrochage dit d'ouverture,
• La figure 4 est une vue partielle illustrant le dispositif d'accrochage dit de fermeture,
• La figure 5 est une vue partielle illustrant le système à glissière selon l'invention et la palette de la bobine montés sur la demi-lune de fermeture, en position extraite de la glissière,
• La figure 6 est une vue similaire à la figure précédente selon une autre orientation, en position escamotée de la glissière,
• La figure 7 est une vue similaire à la figure 6, sans le support de glissière,
• La figure 8 est une vue éclatée des figures 5 ou 6,
• La figure 9 est une vue partielle en perspective illustrant le disjoncteur, vu de l'arrière par rapport aux figures 3 et 4, en position ouverte prêt à être fermé, avant l'actionnement du bouton de fermeture,
• La figure 10 est une vue en plan de la figure 9, après le retrait du support de bouton,
• La figure 11 est une vue similaire à la figure 9, le disjoncteur étant en position fermée,
• La figure 12 est une vue en plan de la figure 11 et comportant un arraché, de manière à montrer l'appareil sans le support de bouton,
• La figure 13 illustre la mise en service du dispositif d'inter-verrouillage pour empêcher la mise à la terre de l'appareil,
• La figure 14 est une vue partielle en plan, illustrant la partie disjoncteur lors d'une ouverture maintenue du bouton d'ouverture,
• La figure 15 est une vue similaire à la figure 14, mais comportant un arraché illustrant la partie disjoncteur lors d'un ordre d'ouverture maintenu par la bobine d'ouverture,
• La figure 16 est une vue partielle en perspective illustrant le dispositif d'inter-verrouillage entre l'arbre de manoeuvre du disjoncteur et l'arbre de manoeuvre de la mise à la terre,
• Les figures 16a et 16b sont des vues partielles en perspective, illustrant les moyens de renvoi selon l'invention,
• La figure 17 est une vue partielle en plan, illustrant le disjoncteur en position prêt à fermer, le sélecteur étant en position terre,
• La figure 18 est une vue similaire à la figure 17, l'arbre de mise à la terre ayant été entraîné,
• La figure 19 est une vue partielle en perspective, illustrant l'actionnement d'une serrure d'inter-verrouillage pour empêcher l'accès à l'arbre de commande du disjoncteur, et
• Les figures 20,21 et 22 sont des vues partielles en perspective, illustrant trois réalisations possibles des boutons d'actionnement de fermeture et d'ouverture,

Other features and advantages will appear on reading a preferred embodiment given by way of non-limiting example, described with reference to the figures in which:

• The figure 1 is a plan view illustrating the inner portion of a portion of the control of the medium voltage electrical cell according to the invention,
• The figure 2 is a detail view on an enlarged scale, more particularly illustrating the opening and closing fastening systems of the circuit breaker or switch of the cell,
• The figure 3 is a partial view illustrating the so-called opening fastening device,
• The figure 4 is a partial view illustrating the so-called closing fastening device,
• The figure 5 is a partial view illustrating the slide system according to the invention and the pallet of the coil mounted on the half-moon closure, in the extracted position of the slide,
• The figure 6 is a view similar to the previous figure in another orientation, in the retracted position of the slide,
• The figure 7 is a view similar to the figure 6 , without the slide holder,
• The figure 8 is an exploded view of figures 5 or 6 ,
• The figure 9 is a partial perspective view illustrating the circuit breaker, seen from the back with respect to figures 3 and 4 , in open position ready to be closed, before actuating the closure button,
• The figure 10 is a plan view of the figure 9 after removal of the button support,
• The figure 11 is a view similar to the figure 9 with the circuit breaker in the closed position,
• The figure 12 is a plan view of the figure 11 and having a snatch, so as to show the device without the button support,
• The figure 13 illustrates the commissioning of the interlock device to prevent earthing of the device,
• The figure 14 is a partial plan view, illustrating the circuit breaker part during a maintained opening of the opening button,
• The figure 15 is a view similar to the figure 14 but having a tear-off illustrating the circuit breaker part during an opening command held by the opening coil,
• The figure 16 is a partial perspective view illustrating the interlocking device between the operating shaft of the circuit breaker and the operating shaft of the grounding,
• The Figures 16a and 16b are partial views in perspective, illustrating the return means according to the invention,
• The figure 17 is a partial plan view illustrating the circuit breaker in the ready-to-close position, the selector being in the earth position,
• The figure 18 is a view similar to the figure 17 the grounding shaft has been driven,
• The figure 19 is a partial perspective view, illustrating the actuation of an interlock lock to prevent access to the control shaft of the circuit breaker, and
• The figures 20 , 21 and 22 are partial perspective views, illustrating three possible embodiments of the closing and opening actuating buttons,

DETAILED DESCRIPTION OF A PARTICULAR EMBODIMENT

On the figure 1 , we see a medium voltage electrical distribution cell C intended to be interposed between two parts of an electrical circuit so as to ensure at least the functions respectively of current flow between the parts, of interruption of the current between the parts, of circuit isolation and grounding of one of the circuit parts, such a cell being described in the patent application FR 2 940 516 of the plaintiff.

This cell C comprises a circuit breaker (or switch) preferably with vacuum breaking technology such as a vacuum interrupter, said circuit breaker also performing the disconnector function and, in series with said circuit breaker, a grounding device comprising a selector S at least two positions respectively a current passage position and a grounding position of one of the circuit parts, said circuit breaker (switch) being electrically connected upstream for example to a busbar, and in downstream, to the aforementioned selector S, which is electrically connected downstream for example to at least one cable, said cell being able to take three positions respectively a closed position, a disconnected position and a grounding position.

On the figure 1 this cell C comprises a shaft 1 for operating the control of the circuit breaker, mechanically connected to the shaft 2 for actuating the contacts of the vacuum interrupter, and able to be operated manually by means of an operating lever in order to achieve the opening or manually closing the contacts of said bulb, or a resetting after an opening, according to the use of the cell, through an orifice provided in the casing of the apparatus.

This grounding device comprises a shaft 3 for grounding the contacts of the circuit breaker and a drive shaft 4 of this shaft.

Apart from the case of an opening of the contacts of the bulb when an electrical fault occurs on the line to be protected, the contacts of the bulb can be opened or closed by opening and closing buttons 5 6 or 7,8 respectively reels of opening 7 or closing 8 can be operated remotely.

The contacts of the vacuum interrupter are held in the open position or in the closed position respectively by means of a so-called closing fastening device 9 and a so-called opening fastening device 10.

The so-called closing fastening device 9, able to maintain the energy for closing the contacts of the bulb in the open or closed position, comprises a hook 11 resting in a hooked position on a closure member 12 in the form of a half one called closing half-moon, this half-moon being integral with a shaft 13 by which it is rotatable about a fixed axis of the cell, this half-moon and its associated shaft being mechanically connected to the control shaft 1 of the closing mechanism, such that the unlocking of the closing catch 9 on the closing half-moon 12 releases the shaft 1 which drives the operating shaft 2 of the rotating bulb in the sense of closing the contacts.

In the same way, the so-called opening hooking device 10, able to maintain the contacts of the bulb in the closed position, comprises a hook 14 cooperating with an opening member 15 called an opening half-moon. half-moon being also secured to a shaft (not shown) by which it is rotatable about a fixed axis of the cell, the half-moon 15 and its associated shaft being mechanically connected to the control shaft 2 of the movable contact (s) of the bulb such that the unlocking of the opening catch 10 on the half-moon 15 drives the operating shaft 2 of the bulb rotating in the sense of opening contacts.

These clashes 9, 10 are made to be deactivated by the actuation of either the opening or closing buttons 6, or the opening or closing coils 8, whose actuating elements 17, 18, 19 , 20 are able to act on the corresponding half-moons, either directly with regard to the opening catch 10 or via a mechanical connection L with regard to the closing catch 9, so as to deactivate the corresponding catch and thus cause either opening or closing of the movable contacts of the bulb, via the opening or closing springs associated with the aforementioned half-moons 15,12.

With regard to the closing fastening device 9 only, the cell C also comprises a closing energy spring 23 adapted to cooperate with the closing fastening device 9 so as to unlock the latter, to increase the closing speed of the contacts of the bulb when unlocking the hanging.

This mechanical connection L illustrated on the Figures 5 to 8 , comprises a slide support 24 inside which is slidably mounted a slide 25, said support and the slide being traversed by the closing half-moon 12, which is fixed by embedding by its free end portion 26 on the slide support 24 having a correspondingly shaped opening for the passage of this end portion.

This slide 25 has two elongate openings 27,28 ( figures 7 and 8 ) separated by a partition 29, one 28 of the openings 27,28 being intended to be traversed by the aforementioned end portion 26 of the half-moon 12 and to accommodate a spring 30 interposed between a flat portion 31 belonging to this part end and the inner face 33, opposite said flat, belonging to the slide, while the face 32 of this end portion 26 of half-moon, opposite that having the flat portion 31, bears against the partition aforementioned 29 of the slide 25.

This slide 25 is recalled in the extended position illustrated on the figure 5 by means of the aforementioned spring 30, the displacement of the slide 25 towards its retracted position illustrated on the figure 6 being obtained by the actuation of an operating portion 34 of the slide 25 forming a stud cooperating with return means R such that they will be described in the following.

On these Figures 5 to 8 a piece mounted around the half-moon shaft and able to rotate freely about the axis of the half moon, this part being the pallet 35 of a closing coil 8.

This pallet 35 has a projecting portion 36 adapted to cooperate with a projecting portion 37 belonging to the slide 25, these two parts extending substantially parallel to the axis of the half-moon, so that when the slide is in the deployed position, the pallet 35 is able to drive the half moon 12 in rotation during the actuation of the coil 8, whereas when the slide 25 is retracted, actuation of the coil has no effect on the slide 25 and thus on the half-moon 12.

Around the drive shaft 2 of the contacts of the vacuum interrupter of the circuit breaker is mounted a rigid part integral with said shaft, called the position indicator 38. This indicator cooperates with one of the 41 end portions 41, 42 said first of an angled return lever 39 said reference of the indicator, mounted hinged about a fixed axis of the support of the apparatus, as illustrated on the Figures 16a and 16b . Around a second axis of the support is also mounted articulated a second return lever 40, said slide return, having a first portion 43 intended to cooperate with the second end portion 42 of the reference 39 of the indicator, and a second portion 44, intended to cooperate with the slide 25, as will be described in the following.

On the Figures 16a and 16b it can be seen that the first lever 39 is capable of driving the second lever 40 in one direction or the other via two studs 54, 55 located on the rear face of the first part 43 of the second lever 40 cooperating with the second portion 42 of the first lever 39.

As already indicated above, this cell C also comprises a grounding switch in series with the above-mentioned circuit breaker, said switch comprising an operating shaft 4 of the grounding shaft 3 which can be operated by means of a control lever. through a hole provided for this purpose, after the actuation of a selector S of choice. The actuation of this selector S has the effect of releasing or closing the access port to said grounding shaft 3 by means of a lever 51, said second interlocking lever having a flap of shutting 53.

The circuit breaker and the grounding switch are mechanically connected by an interlocking device I, more particularly illustrated in FIG. figure 16 and to prevent the actuation of the selector S from the earthing of the cell when the circuit-breaker is in the closed position, to prevent access to the control shaft 1 of the circuit-breaker when the selector S is in position earth, the opening of the operating lever of the earth shaft 3 being released, and to prevent the closure of the circuit breaker during an intention to ground, the selector S being in position grounding.

For this purpose, the interlocking device I comprises a first interlocking lever 45 mounted hinged around the operating shaft 2 of the contacts of the circuit-breaker lamp, said lever 45 comprising a first arm 46 comprising a shutter 47 adapted to close the opening of operation of the circuit breaker, said first lever 45 being connected in an articulated manner via a second arm 48 at one end of a connecting rod 49 whose other end is connected by articulated manner at one end of a so-called first arm 50 belonging to a second interlocking lever 51 mounted articulated around a fixed axis of the cell and having a second arm 52 whose free end comprises a flap 53 shutting off the access hole to the grounding shaft 3.

The axis of articulation between the connecting rod 49 and the second interlock lever 51 is extended by a stud 56 intended to be introduced into a slot 57 of the selector S, which is slidably mounted relative to a fixed support of the cell between a position in which the earthing is allowed and a position in which the earthing is prohibited, said selector S can be driven between these two positions by means of an operating member 58 located on its outer face.

This interlocking device I also comprises a lock 59 comprising a cam 60 adapted to cooperate with a return part 61 integral with the aforementioned first interlocking lever 45, said lock 59 being able to drive said lever 45 into the position d closing the maneuvering orifice of the operating shaft 1 of the circuit breaker control.

This return part 61 is also intended to cooperate with a stud 62 integral with the slideway 40, so as to drive the slideway 25 into a groove. position retracted into the support, when the selector S is brought into the grounding and shutter position of the access port to the control shaft 1.

This interlock device I also comprises a stud 63 integral with the above-mentioned position indicator 38 and adapted to cooperate with the first interlocking lever 45 so as to prevent the selector S from being operated to the setting position. ground when the circuit breaker is in the closed position.

The operation of the cell according to the invention will be described in the following with reference to the figures.

On the figure 9 , the circuit breaker is in an open position ready to close, a certain amount of accumulated energy being stored in the closing spring around the axis of the half-moon 12. In this position, the spring 30 located inside of the slide 25 has recalled the slide in an extended position in which said slide 25 is located opposite the actuating element 18 of the closure button 6 so as to cooperate with it when it is actuated.

In the same way on the figure 10 the pallet 35 of the spool 8 is in a position illustrated on the figure 5 in which it is ready to drive the closing half-moon 12, as soon as the coil is actuated. In these two figures, the access opening to the control shaft of the circuit breaker 1 is released while the access port to the grounding shaft 3 is closed.

When either the closing button 6 or the closing coil 8 is actuated, the actuating element 18,20 of this element rotates the slide 25 either directly for the button or via the pallet 35. as regards the coil, and therefore the closing half-moon 12, which causes the unlocking of the closing fastener 9 and thus the closing of the contacts of the vacuum interrupter, as illustrated on the figures 11 , 12 and 13 .

During the passage of the cell C from the open position to the closed position, the rotation of the shaft 2 of operating the bulbs which results in the counterclockwise direction, causes the position indicator 38 in rotation, which causes in its movement the first deflection lever 39 in the clockwise direction and the second deflection lever 40 in the counterclockwise direction, this having the effect of driving the slide 25 to a retracted position thereof, a position illustrated in FIGS. figures 11 , 12 and 13 .

In this position, a new action on the closing button 6 or a new actuation of the closing coil 8, have no effect on the slide 25 because it is retracted. On the other hand, the displacement of the selector S to a position allowing the operation of the grounding shaft 3 is prevented by bringing into abutment the first interlocking lever 45 with the stud 63 present on the ground. position indicator 38.

In this position, access to the operating shaft 1 of the control is allowed to accumulate energy in the control, while access to the grounding shaft 3 is prevented.

From a closed position as illustrated on figures 11 , 12 and 13 , and after an unmaintained opening command, the actuating element 17 of the opening button 5 or of the opening spool 7 causes the opening catch 10 to be unlocked and then an action on the return 15a of the opening half-moon 15, which has the effect of causing the slider 40 to return in the counterclockwise direction causing the slider 25 to be in a retracted position, after which, if the opening order is not not maintained, the slide is returned by the spring 30 in an extended position allowing a closure.

However, when the opening order is maintained by the opening button 5 as illustrated on the figure 14 , or by the opening coil 7 as illustrated on the figure 15 , the slide 25 is held by the slide return 40 driven by the half-moon aperture 15a, in its retracted position, preventing any closing action.

On the figure 17 , the circuit breaker is in a ready-to-close position, a certain amount of energy having been accumulated for closing the contacts of the bulb by the closing spring 23. The selector S has been moved to the right of the cell C signaling an intention to ground the cell. This movement has caused on the one hand, the movement in the clockwise direction of the first interlocking lever 45 causing the closing of the insertion opening of the operating lever 1 of the control of the circuit breaker and on the other hand, the counterclockwise movement of the second interlocking lever 51 so as to release the access port to the grounding shaft 3. The first interlocking lever 45 has operated the slide return 40 so that the connection between the slide 25 and the closure button 6 or the closing coil 8 has become impossible.

On the figure 18 the circuit breaker is in a ready-to-close position, the closing energy having been accumulated in the closing spring. The grounding is effective, the earth control shaft 3 having been rotated. A stop 53a is provided on the shutter 53 of the second interlock lever 51 to maintain the position of the earth shaft 3 and prevent it from rotating in the opposite direction after grounding.

On the figure 19 a so-called locking lock 59 has been used to block access to the operating shaft 1 of the control. Thus, thanks to a key, the cam 60 of the lock 59 has been driven 90 ° counterclockwise, which made it possible to drive the return 61 of the first interlocking lever 45 clockwise, so as to on the one hand, to prevent access to the maneuvering orifice of the control shaft 1 and, on the other hand, to drive the selector S to a position of intention of earthing, and to maintain this position of the interlocking levers 45,51, as long as a reverse operation of the key has not been performed. Note that the operating key of the lock 59 can be removed from the lock after a complete rotation of 90 °.

The figures 20 , 21 and 22 illustrate three possible embodiments of the opening and closing buttons 7 that can be used.

The figure 20 illustrates two rotary buttons 64,65 respectively opening and closing operation. These two buttons are operated in two different directions of rotation, for example in the counterclockwise direction to achieve the opening and counterclockwise to achieve the closure.

This rotational movement of each of the buttons is transformed into a rotational movement of the actuating elements 66, 67.

On the figure 21 only one of the buttons 68 is used to make the opening when it is driven counterclockwise, and to perform the closing when the latter is driven clockwise. In this case, the rotational movement of the button is converted into a rotational movement of the two corresponding actuating elements 69,70, able to cause the displacement of the opening half-moon for one or the slide for 'other.

On the figure 22 , the two buttons are pressing buttons 71,72, the actuation of one or the other of the buttons causing the displacement respectively of two different actuating elements 73,74, moving in translation for move the return of the half moon and the slide.

Thus, according to the invention, an interlocking device can be advantageously used in a medium-voltage electrical cell comprising a circuit breaker or a switch alone, or in a cell comprising a circuit breaker or switch in series with an earthing switch.

In the first case, the device according to the invention makes it possible to prohibit giving a closing order if the product is already closed, if a maintained opening order has been given either by the opening button or by the reel. .

In the second case, the device according to the invention makes it possible to prohibit giving a closing command, in addition to the situations mentioned above, in the case where the selector of choice of operation is in the earth position, if the control device is grounded, or if access to the drive shaft is locked by means of a key.

This device is placed advantageously on the front face, and allows to vary the type of button local manual controls.

This solution makes it possible to couple interlocking means necessary for the proper operation of the circuit breaker or switch with the interlocking means necessary for the combination of the circuit breaker or switch with the earthing switch, so as to realize a single device of interlocking design particularly simple.

This device allows to go to earth even if energy is already accumulated in the command for closing, this avoids closing and then opening.

The key lock system drives the first interlocking lever, which operates the slide return and slide. This key locking system prohibits closing even if the closing energy is already accumulated in the circuit breaker.

The device according to the invention makes it possible to use different types of operating buttons comprising an actuating element able to move in translation, so as to actuate the half-moon return for the opening order, or the slide for closing.

Of course, the invention is not limited to the embodiment described and illustrated which has been given by way of example.

On the contrary, the invention comprises all the technical equivalents of the means described and their combinations if they are carried out according to its spirit.

Claims (20)

Device for controlling a medium-voltage electrical protection device interposed between two parts of an electric circuit so as to allow the passage of current or to interrupt the current between the parts, said apparatus comprising an electrical switching device capable of taking up a position closed current passage or an open current interruption position, said breaking device comprising at least one actuating member for opening the contacts of the apparatus and at least one actuating member for closing contacts, said respectively opening and closing actuating members being able to transmit a control command respectively to at least one opening member and to at least one closure member of the contacts via a link mechanical, said control device also comprising means for interrupting the aforementioned mechanical connection so as to to render inoperative any activation of any closing actuating device in cases where it is not necessary to give a closing order in order to guarantee the safety of persons or of the installation, said closure and opening members mentioned above being mounted rotating around two axes substantially parallel to each other, the closing and / or opening of the contacts being obtained by rotating the opening member by the opening actuating member , or respectively of the closing member, by the closing actuating member, the above-mentioned closing and closing elements (15) being located substantially respectively facing a closure actuating member. (18, 20) and an opening actuating member (17, 19), the aforementioned mechanical connection L comprising a part (24) integral with the closure member (12), said part (24) comprising an element (25) retractable movable between a prem position in which said retractable element (25) is adapted to cooperate with the actuating element (18,20) of said closure actuating member (12) so as to transmit the closing order to the organ closure (12), and a second position in which element (25) is retracted and is no longer adapted to cooperate with said actuating element (18,20) of the closure actuating member (18,20), said apparatus further comprising a setting device earth in series with said breaking device,
characterized in that the movement of said member from the deployed position to the retracted position is controlled by a closed state of the contacts or a maintained opening order of the contacts, or by the activation of locking means (59,60, 61) of the access to the operating shaft (1) of the contact control of the switching device, and in that it further comprises an interlock device I controlled by a selector S movable between a first position in which the access port to the operating shaft (1) of the control of the switchgear is released and the access port to the operating shaft (4) of the grounding shaft (3) is closed, and a second position corresponding to an intention to ground or to an effective grounding, in which the access port to the operating shaft ( 4) of the earth shaft (3) is released while the access port to the operating shaft (1) of the control is closed, and in that the movement of said retractable element (25) between the two aforementioned positions is controlled by a return (61) of the aforementioned interlocking device I so as to prevent the closing of the aforementioned apparatus when the selector S is in the second position mentioned above. Control device according to claim 1, characterized in that the aforementioned mechanical connection L comprises a piece (24) forming a slide support integral with the closure member (12) and in which is slidably mounted a slide (25) constituting the retractable element mentioned above. Control device according to claim 2, characterized in that this slide (25) is operated either by an indicator of the position (38) of the contacts, or by a part forming a return (15a) integral with the opening member ( 15) via return means R. Control device according to claims 1 and 3, characterized in that this slide (25) is further operated either by the reference (61) of the interlocking device mentioned above when it is in the aforementioned second position, or by locking means (59, 60, 61) for access to the operating shaft (1) of the control of the switching device controlling the return (61) of interlocking means mentioned above I. Control device according to any one of Claims 1 to 4, characterized in that the aforementioned interlocking device I comprises a first interlocking lever (45) freely rotatably mounted around the control shaft (2). of the cut-off device and comprising a flap (47) able to close off or release the opening for access to the operating shaft (1) of the control of the cut-off device, a second interlocking lever (51) rotatably mounted about a fixed axis of the support and comprising a flap (53) able to release or close the access orifice to the grounding shaft (3), said levers of inter lock (45,51) being mechanically connected by a connecting rod (49), and a selector S traversed by a stud (56) belonging to the first lever (45), said selector S being slidably mounted relative to a fixed support of the apparatus between the two aforementioned positions, the first interlocking lever (45) comprising the return above mentioned (61). Control device according to any one of claims 1 to 5, characterized in that the aforementioned interlocking device I comprises means (63, 38, 45) for closing the access orifice to the shaft (4 ) to operate the earth shaft (3), when this device is in the closed position. Control device according to claims 1, 3 and 6, characterized in that these means comprise a stud (63) integral with a piece (38) integral with the shaft (2) for controlling the contacts of the breaking apparatus and constituting the position indicator of said contacts, said stud (63) cooperating with said first interlocking lever (45). Control device according to claim 3, 4 or 7, characterized in that these return means R comprise a first reference (39) said indicator mounted articulated with respect to an axis belonging to a fixed support of the apparatus and having a first portion (41) cooperating with the piece (38) integral with the contact control shaft of the switchgear constituting the aforesaid indicator and a second reference (40) said sliding guide mounted hinged about a second fixed axis of the equipment support, said second reference having a first portion (43) intended to cooperate with the second portion (42) of the first reference (39) via two studs (54, 55) located on said second return (40), and a second portion (44) for cooperating with a return (15a) of the opening member (15). Control device according to any one of claims 1 to 8, characterized in that said locking means (59,60,61) comprise a lock (59) operable by means of a key and adapted to drive in rotation a cam (60), said cam (60) being adapted to cooperate with the return (61) of said interlocking device I, so as to bring said device into a position of closing or releasing the orifice of access to the operating shaft of the control of the switchgear. Control device according to any one of the preceding claims, characterized in that one or each opening member (15) or closing member (12) is integral with a secondary opening or closing shaft (13). ), said secondary shafts being mechanically connected to the control shaft (2) of the switchgear, each of the opening members (15) and closure (12) being retained in a position corresponding to a closed position or respectively open contacts of the apparatus by an aperture attachment device (10) or closing respectively (9), these attachment devices being unlockable by the actuation of the corresponding member. Control device according to any one of claims 2 to 10, characterized in that the aforementioned slide (25) comprises two openings (27,28) separated by a partition (29), one (28) of the openings being intended receiving an end portion (26) of the closure member (12), said portion bearing against the partition (29), and a spring (30) supported by one of its ends, on a flat part (31) belonging to the aforementioned end part (26), and by its opposite end, on an inner face (33) of the slide (25), said slide also comprising a stud (34) integral with said slide (25) and intended to cooperate with the slide return (40) so as to allow driving said slide (25) from one position to another. Control device according to any one of the preceding claims, characterized in that it comprises at least one manual opening operation button (5) and at least one manual closing operation button (6), the actuating element (17,18) of each button being adapted, when activated, to cooperate with the slide (25) so as to drive it in rotation. Control device according to Claim 12, characterized in that the or each manual opening operation button and the or each manual closing operating button is (are) located on the front face of the apparatus , so as to be maneuverable from this face by a user. Control device according to claim 12 or 13, characterized in that one or each manual opening (5) or closing (6) actuating member is a pressure button (71, 72) comprising a actuating (73, 74) movable in translation to move the opening member (15) or the slide (25) in rotation, depending on whether the button (71, 72) is used for opening or closing. Control device according to claim 12 or 13, characterized in that one or each manual opening or closing actuating member is a rotary knob (64, 65) having an actuating element (66, 67). movable in rotation to move the opening member (15) or the slide (25) in rotation, depending on whether the button is used for opening or closing. Control device according to claim 12 or 13, characterized in that it comprises a single rotary knob (68) movable in rotation in one direction or in the other for opening or closing, said knob comprising two actuating elements (69,70) movable in rotation in two opposite directions of rotation and able to cooperate respectively with the opening member (15) or the slide (25). Control device according to any one of the preceding claims, characterized in that it comprises at least one remote actuating coil (8), the actuating element (19,20) of the coil (7,8 ) cooperating with the slide (25) via a support (24) comprising a pallet (35) rotatably mounted around the closure member (12), said support (24) having a portion (36) cooperating with a portion (37) of the slide (25), so that the actuation of the coil (8) drives, through the pallet (35), the rotation of the support (24) and the slide (25) and thus the rotation of the closure member (12). Control device according to one of the preceding claims, characterized in that the switching device is a vacuum circuit-breaker or a vacuum interrupter and the earthing device is an earthing switch. Medium voltage electrical protection device comprising an opening member (15) and a closing member (12) able to control the opening and closing of the contacts, characterized in that it comprises a control device according to one any of claims 1 to 18. Medium-voltage electrical cell comprising at least one apparatus according to claim 19.

Images